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A few days ago, I let update-manager upgrade my kernel from 4.18.0-13 to
4.18.0-14. Since then, my system is unable to boot. It freezes after

  fb: switching to inteldrmfb from VESA VGA

but before it gets around to asking me the passphrase for my encrypted
main partition. (At first I thought it was a problem with cryptsetup
because it never got to that prompt, but now I'm pretty sure it's
something to do with changing video mode.)

However, if I use the grub menu to select the older 4.18.0-13, the
system boots just fine. It looks very much like a bug introduced between
4.18.0-13 and 4.18.0-14.

Additionally, if I boot 4.18.0-14 in maintenance mode, the kernel
modesetting does not happen, and the system boots just fine. (Except for
the 1980s-style low-res video, that is.) This seems like good evidence
that it's a problem with setting the video mode.

I'll test with some mainline builds, but I want to get this bug report opened 
before I start rebooting.
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 18.10
HibernationDevice: RESUME=UUID=fb24f9f1-0e89-4ef6-a88a-fb9fc5d776c7
InstallationDate: Installed on 2018-09-05 (155 days ago)
InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
 enp2s0    no wireless extensions.
 lo        no wireless extensions.
MachineType: System manufacturer System Product Name
Package: linux (not installed)
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-14-generic 
root=/dev/mapper/lubuntu--vg-root ro
ProcVersionSignature: Ubuntu 4.18.0-14.15-generic 4.18.20
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
 linux-restricted-modules-4.18.0-14-generic N/A
 linux-backports-modules-4.18.0-14-generic  N/A
 linux-firmware                             1.175.1
Tags:  cosmic
Uname: Linux 4.18.0-14-generic x86_64
UpgradeStatus: Upgraded to cosmic on 2019-01-23 (16 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo wireshark
_MarkForUpload: True 07/22/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1604
dmi.board.asset.tag: To Be Filled By O.E.M. P7H55-M PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi:bvnAmericanMegatrendsInc.:bvr1604:bd07/22/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7H55-MPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: To Be Filled By O.E.M. System Product Name
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: apport-collected cosmic kernel-bug
kernel hangs on boot after "fb: switching to inteldrmfb from VESA VGA"
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